TW546459B - Evaporator and refrigerator - Google Patents

Abstract

In an evaporator composed by providing plural heat-transfer pipes for flowing cold water in a container into which a refrigerant is introduced, the heat-transfer pipes are divided into plural pipe groups and the pipe groups are arranged in a zigzag pattern with intervals between each adjacent pipe groups. Bubbles which are generated around the heat-transfer pipes provided lower position, easily come to the surface of the refrigerant, and further, there are few bubbles which degrade the performance of the heat-transfer pipes positioned around the center of the pipe groups, preventing a fall in the heat transfer coefficient.

Description

546459

BACKGROUND OF THE INVENTION Field of the Invention The present invention is to provide an evaporator which cools the object to be cooled by performing heat exchange between the object to be cooled (for example, water, seawater, etc.) and a refrigerant; and The evaporator of the freezer. Description of related technology For example, in a large building like a building, the cooling water cooled by the machine is cooled by the pipes laid in the building to circulate the heat, so as to exchange heat with the air in each space to achieve the cooling effect. An example of an evaporator having a cold engine is shown in FIG. 10. The structure of the evaporator is such that a plurality of heat transfer tubes 2 through which cold water flows are arranged in a staggered bundle in a cylindrical container? Into which a refrigerant is introduced. The heat transfer tube 2 is separated from the outbound heat transfer tube connected to the cold water inlet 3 and the four-phase heat transfer tube connected to the cold water inlet 3. The cold water flowing from the cold water inlet 3 reaches the water through the outbound heat transfer tube in the container The chamber (not shown) is folded back and then flows out of the cold water inlet 4 through the outbound heat transfer tube in the container. In this process, the cold water is cooled by exchanging heat with the refrigerant introduced into the container i; on the other hand, the cold water is deprived of heat by the cold water and boiled and vaporized. However, because the previous evaporator was constructed to hold most of the heat transfer tubes, the refrigerant that turned around around the heat transfer tubes located in the lower part of the container became air bubbles; because the heat transfer tubes wound on it were made of liquid It floats inside, so the liquid refrigerant tends to be insufficiently supplied around the upper heat transfer tube. Therefore, there is a problem, especially in the center of the bundle. (Relatively in the core part) The heat transfer efficiency of the heat transfer tubes near

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-4- 546459 V. Description of the invention (2 A7 B7

The heat pipe came low. Problem to be Solved by the Invention 'The purpose of the present invention is #in the above-mentioned circumstances', to improve the release of air bubbles from the refrigerant in the container, to improve the transmission efficiency of the evaporator, and to provide a highly efficient refrigerator. V Means to solve the above-mentioned problems, the evaporator and the cold aging are adopted as follows:. In other words, the evaporator of the present invention is configured in a container in which a refrigerant is introduced, and a plurality of heat transfer tubes that circulate the object to be cooled are arranged in a bundle, and heat exchange is performed between the refrigerant and the object to be cooled. The 'cooling humic object' simultaneously vaporizes the above-mentioned refrigerant; the above-mentioned heat transfer tube is formed into; and a number of tube groups are arranged separately from each other. As for this hairspreader, the heat transfer tubes are divided into a plurality of tube groups, and the tube groups are arranged separately from each other. Therefore, the air bubbles generated around the lower heat transfer tubes are compared by the tube groups and the tubes. The separation between the clusters floats, and the air bubbles in the clusters are reduced. Therefore, the number of bubbles affecting the heat transfer tubes arranged near the center of the tube group is reduced, and a decrease in heat transfer efficiency can be suppressed. In addition, although the liquid refrigerant introduced into the container flows, since the official groups are disposed separately from each other, the refrigerant becomes easy to flow. Therefore, the contact between the refrigerant liquid and the heat transfer tube can be promoted, and the heat transfer efficiency can be improved. In addition, in the evaporator described above, a plurality of tube groups may be arranged in a staggered manner. A kind of hair dryer ’whose structure is liquid refrigerant is drawn from below the container -5-

Binding

k 546459 V. Description of the invention (3 in, evaporates from above. The hair dryer has a tendency to flow inwardly and upwardly. Therefore, in this case: the shape of the refrigerant is arranged in the container, which can promote upwards. Pipes are staggered, 杳? 丨 for your contact with the refrigerant liquid flowing in the mission tube, and the heat transfer efficiency is improved. Dan ... & In addition, the above-mentioned evaporation 罘 is not configured The above-mentioned obstacles of the heat transfer tube: The [] can also be left in the official group. The evaporator 'is easily detached due to the bubbles near the indwelling gap of the tube group. Because: the bubbles affected by the central heat transfer tube will change. Less,…: placed near… the center is low. It is enough to suppress the decrease in heat transmission efficiency. In addition, the above mentioned ^ .. ^… rabbits. The above heat transfer tubes can be staggered in any group of tubes. The liquid refrigerant introduced into the container flows as described above. Therefore, the evaporators are arranged in a staggered manner because the heat transfer tubes are arranged here; even in the tube group, the refrigerant becomes easy to flow. And can promote refrigerant fluid and The contact of the heat transfer tubes improves the heat transfer efficiency. In addition, in the evaporator, the heat transfer officer belonging to the tube group located in the upper part of the container can be arranged loosely than the heat transfer tubes located in the tube group located in the lower part. As for the above-mentioned evaporator, when the air bubbles generated around the heat transfer tubes of the tube group located at the lower part of the container pass through the tube group located at the upper part, the heat transfer tubes belonging to the tube group are looser than the lower tube group. With the arrangement, the air bubbles are easily separated from the heat transfer tubes belonging to the upper tube group. Therefore, it is possible to suppress the decrease in the heat transfer efficiency of the upper tube group. -6- This paper standard is applicable to the Chinese National Standard (CNS) Α4 standard (210 X 297 mm)

546459 A7 _____ B7. Description of the invention (4)-The cold machine of the present invention has a type of evaporation ^, which is placed in a container where the refrigerant is introduced, and most of the heat transfer tubes that circulate the object to be cooled are cut off. It is configured to perform heat exchange between the refrigerant and the object to be cooled, and to cool the object to be cooled while gasifying the refrigerant; and a compressor that compresses the refrigerant that is vaporized in the evaporator; and a condensation An evaporator is used for condensing and liquefying the compressed refrigerant, and a second type of expansion is for reducing the pressure of the refrigerant during the process of passing the liquefied refrigerant through the evaporator. As for the refrigerator, as described above, the heat transfer efficiency of the heat transfer tube in the evaporator can be improved. As a result, the heat exchange efficiency can be improved, and even if the cost of tritium is suppressed, the same and previous performance can be obtained, especially Is cooling efficiency. Brief Description of the Drawings Fig. 1 is a diagram showing an i-th embodiment of the present invention, and is a schematic diagram of a refrigerator. Fig. 2 is a cross-sectional view of the evaporator (a cross section of Fig. 11 and Fig. 11). Fig. 3 is a layout diagram of a heat transfer tube of an evaporator. Fig. 4 is a sectional view showing an evaporator according to a second embodiment of the present invention. Fig. 5 is a sectional view showing an evaporator according to another example of the second embodiment of the present invention. Fig. 6 is a sectional view showing an evaporator according to a third embodiment of the present invention. Fig. 7 is a sectional view showing an evaporator according to a fourth embodiment of the present invention. Fig. 8 is a sectional view showing an evaporator according to another embodiment of the present invention. Fig. 9 is a sectional view showing an evaporator according to another embodiment of the present invention.

297 mm) 546459 A7 _________B7 V. Description of the invention (5) Figure 10 is a sectional view of a conventional evaporator with a refrigerator. DETAILED DESCRIPTION OF THE INVENTION A first embodiment of an evaporator and a refrigerator according to the present invention will be described with reference to Figs. 1 to 3. The schematic structure of a refrigerator is shown in FIG. The refrigerating machine shown in the figure includes a condenser for condensing and liquefying the refrigerant by performing heat exchange between the water in the cooled part and the gaseous refrigerant, and an expansion valve 1 1 ′ for reducing the pressure of the condensed refrigerant. And an evaporator that performs heat exchange between the condensed refrigerant and cold water (the object to be cooled), and at the same time evaporates and vaporizes the refrigerant, and a compressor that provides the condenser with the vaporized refrigerant compressed. The cold water system produced by the evaporator 1 2 in the freezer is used in the air conditioner of the building and the like. The trough is 1 2 '. Its structure is in the cylindrical container 1 4 where the refrigerant is introduced. Most of the heat transfer tubes that circulate cold water are bundled (shown schematically in FIG. 1) and are arranged in the length of the container 14. Side direction. The heat transfer tube 15 is separated from the outbound heat transfer tube connected to the cold water inlet and the return heat transfer tube connected to the cold water inlet 17. The direction of the cold water is in the pipeline connected to the cold water inlet 16 and the pipeline connected to the cold water inlet 17. Not the same. FIG. 2 is a sectional view of the evaporator 12. In the lower half of the container 14, the heat transfer tubes 15 are divided into nine tube groups A to I, and the tube groups a to I are adjacent to each other and are not related, and are arranged in a staggered manner. In detail, the pipe groups A to e are arranged horizontally ', while the pipe groups F to I are arranged horizontally, and the pipe groups A to E are arranged in a staggered manner because they are translated horizontally. In addition, about any of the tube groups A to I, about 100 heat transfer tubes 15 are gathered. In addition, in these tube groups a to I, the heat transfer tubes 15 are arranged in a staggered manner. This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) M6459 A7 ---------- B7_ V. Description of the invention (6) '-column. At this time, the heat transfer tubes 5 arranged in a plurality of stages are also shifted in a staggered manner because they are shifted in each stage. Furthermore, the heat transfer tubes 5 arranged in a staggered pattern, as shown in FIG. 3, having a diameter D, the interval between the heat transfer tubes i 5 adjacent in the horizontal direction becomes 1.1 5D. As for the evaporator 12 constructed as described above, since the heat transfer tubes 15 are divided into tube groups A to I, the tube groups are arranged independently of each other. In each tube group, the heat transfer tubes 15 below are compared. The bubbles generated from the surroundings are separated and floated between the tube group and the tube group, and the air bubbles existing in the tube group are reduced. Therefore, the number of bubbles affecting the heat transfer tube i 5 arranged near the center of the tube group is reduced, and a decrease in heat transfer efficiency can be suppressed. In addition, in the structure of the valley device 14, the liquid refrigerant is introduced from the lower part, and is discharged from the upper part to the outside of the container 14. The introduced refrigerant tends to flow upward in the container 14, but Since the tube groups are arranged independently of each other, the refrigerant becomes easy to flow. Therefore, the contact between the refrigerant and the cold water can be promoted, and heat transfer efficiency can be improved. Furthermore, while the tube groups A to I are arranged in a staggered manner, since the heat transfer tubes 15 are also arranged in a staggered manner in each of the tube groups A to I, the refrigerant liquid flowing upward and the heat transfer tubes can be promoted. Contact, and the heat transfer efficiency is improved. As described above, if the evaporator 12 is configured as described above, the heat transfer efficiency can be improved, and therefore, the cooling efficiency of the refrigerator can be improved. Moreover, in this embodiment, the heat transfer tubes 15 are divided into nine tube groups of A to I, but these are divided into -9 according to the size of the evaporator and the performance that should be exerted. This paper standard applies the Chinese national standard (CNS ) A4 size (210 X 297 mm) 546459 A7 B7 V. Description of the invention (7) It is also possible to have a smaller number of tube groups, and vice versa. In addition, the interval between the heat transfer tubes i 5 adjacent in the horizontal direction is set to i · 5D, but it is not limited to this, and can be selected according to various conditions. Next, a second embodiment of the evaporator and the freezer according to the present invention will be described with reference to FIGS. 4 and 5. Here, the same reference numerals are given to the constituent elements already described in the above-mentioned embodiment, and the description is omitted. Fig. 4 is a sectional view of the evaporator 12; As shown in the figure, in the evaporator 12 according to this embodiment, in the tube groups A to E, the heat transfer tubes 15 are arranged vertically and horizontally in a so-called grid pattern. In addition, the tube groups F to I are the same as the i-th embodiment described above, and they are disposed in a staggered manner. Furthermore, in the tube groups A to E, the interval between the heat transfer tubes i 5 adjacent to each other in the horizontal direction is not set to 1. 1 5 D ', and the interval between the heat transfer tubes 15 and 5 is set to 2 to 3D. . In addition, the interval between the heat transfer tubes 相邻 adjacent in the vertical direction of the tube groups F to I is narrower than the interval in the vertical direction of the heat transfer tubes L 5 in the tube groups A to E. In other words, the heat transfer tubes 15 belonging to the tube groups A to E are arranged looser than the heat transfer tubes 15 belonging to the tube groups F to I. When bubbles formed around the heat transfer tubes 15 of the tube groups F to I pass through the tube groups A to E as described above, the heat transfer tubes 15 belonging to the tube groups a to E belong to The heat transfer tubes 15 of the tube groups F to I are relatively loosely arranged. Therefore, the air bubbles between the heat transfer tubes 15 belonging to the tube groups A to E are easily detached, and a decrease in heat transmission efficiency can be suppressed. As described above, according to the evaporator 2 of this embodiment, the heat transfer efficiency can also be improved, and therefore, the cooling efficiency of the refrigerator can be improved. Moreover, in this embodiment, although the heat transfer tubes 15 of the tube groups A to E are made into -10-this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 546459 A7 B7

After the lattice, the heat transfer tubes 5 to 5 of the tube groups F to I are arranged more loosely, but it is also okay to arrange any of the heat transfer tubes 15 or 5 of the tube groups A to E to be loose 2 as a whole. Fig. 5 is a cross-sectional view showing another example of the evaporator 2 according to this embodiment. In the tube groups A · ~ L ', the heat transfer tubes 15 are arranged in a staggered manner similarly to the i-th embodiment. As for the tube groups A 'to F, the interval between the adjacent heat transfer tubes 15 in the horizontal direction is set to 1 · 15D. In addition, the distance between the heat transfer tubes 15 adjacent to each other in the tube group G, ~ L, and the up-down direction is set to be more than that between the heat transfer tubes 15, 5 in the tube group a, ~ F, and narrow. That is, the heat transfer tubes 15 belonging to the tube groups A, ~ F, are arranged more loosely than the heat transfer tubes 15 belonging to the tube group G '~ Lf. As described above, in the evaporator 12 in which the heat transfer tubes 15 are arranged, the tube groups A, to F, and the tube groups G 'to L1 are arranged in a grid pattern. According to the above configuration, when the air bubbles generated around the heat transfer tubes 15 of the tube groups G ′ to L ′ pass through the tube groups A1 to F, because these heat transfer tubes 15 belonging to the tube groups A, to F are compared with The heat transfer tubes 15 belonging to the tube group G to L1 are relatively loosely arranged. Therefore, the air bubbles between the heat transfer tubes 15 belonging to the tube group A to Lf are easily detached, and a reduction in heat transfer efficiency can be suppressed. Therefore, the heat transfer efficiency can be improved, and accordingly, the cooling efficiency of the refrigerator can be improved. In the above configuration, although the heat transfer tubes 15 of the tube group Af to F 'are arranged looser than the heat transfer tubes 15 of the tube group G f to L', any of the heat transfer tubes of the tube group a, ~ L, 15 or the entire heat transfer tubes 15 may be arranged loosely in a staggered manner. Next, the third embodiment of the evaporator and the freezer of the present invention is shown in Table -11-The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 546459 A7

This is illustrated in FIG. 6. Here, the same reference numerals are given to the constituent elements that have been described in the above-mentioned respective complaints, and the description is omitted. Illustration. 6 series of locks! Sectional view of 2. Female σ 图 所 #, in the evaporator 12 of this embodiment, the heat transfer officer 5 is divided by 4% in the horizontal direction, leaving a gap between the tube groups. This gap is arranged as a bundle of 2 heat & 1 5 fathers in a staggered arrangement as previously, and a predetermined heat transfer officer 1 5 or 3 branches are removed and arranged alternately, and this will be referred to as the removal row 20 below. 〇 Further, in the tube groups J to M, the gaps in which the heat transfer tubes 15 are not arranged are left in parallel with the removal row 20. This gap is also removed in parallel to the removal of the specified heat transfer tube 15 or two, so the following will be referred to as the auxiliary removal of the removal line 21 in the following. In the evaporator 12 constituted as described above, since the extraction row and the auxiliary extraction row 21 are arranged, bubbles generated around the heat pipe 15 below the comparison in the tube group j to M are separated from the extraction row 2 or the auxiliary extraction row 21 1 floats. . Therefore, the number of bubbles affecting the heat transfer tubes 15 arranged near and above the center of the official group is reduced, and a decrease in heat transfer efficiency can be suppressed. The first person's fourth embodiment of the evaporator and the refrigerator of the present invention is shown in Fig. 7 for explanation. Here, the same reference numerals are given to the constituent elements already described in each of the above embodiments, and the description is omitted. Fig. 7 is a sectional view of the evaporator 12; As shown in the figure, in the vaporizer 12 of this embodiment, the tube group J, µ is different from the above-mentioned auxiliary extraction column 21, and the semi-assisted extraction column 2 2 which is not detached from above and below is provided similarly to the auxiliary extraction column 2 1. -12- This paper size applies to China National Standard (CNS) Α4 size (210 X 297 mm)

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Line 546459 A7 __B7 V. Description of the invention (10) In the evaporator 12 constructed as described above, since the semi-assisted removal row 2 2 is provided, the bubbles near the center of the tube group J, M become easy to detach, Since the number of bubbles affected by the heat transfer tubes 15 near the center of the groups J and M is reduced, it is possible to suppress a decrease in heat transmission efficiency. In addition, the semi-assisted removal row 2 2 may be arranged in any one of the pipe groups J to M. Hereinafter, other embodiments will be briefly described. Fig. 8 shows an example in which the semi-assisted removal row 2 2 is provided below the tube group j, M. Fig. 9 shows an example where the branch is extended obliquely upward from the auxiliary removal row 21 and a small auxiliary removal row 23 is arranged. These various configuration types are best selected according to the size of the evaporator and the performance it should play. Furthermore, as for the heat transfer tubes 15 of the above-mentioned various embodiments, of course, scroll tubes, fin tubes, and all other tube materials can be used. In addition, as for each of the above-mentioned embodiments, although the structure in which the cold water flows back and forth in the evaporator is taken as an example, the evaporator of the present invention can be applied to cold water flowing in one direction, several round trips, and from The technology of all the constructed evaporators that flow from one side to the other and then flow out from the other side.

Claims (1)

546459 A8 B8 C8 _____D8 VI. Patent application scope 0 L hair treatment devices, which are arranged in the container where the refrigerant is introduced, and most of the heat transfer tubes that circulate the object to be cooled are arranged in bundles. Heat exchange is performed between the cooling objects to cool the object to be cooled, and at the same time, the refrigerant is gasified; the heat transfer tube is divided into a plurality of tube groups, and the tube groups are arranged separately from each other. 2. The evaporator according to the scope of the patent application, wherein the plurality of tube groups are staggered. 3. The evaporator according to item 1 of the scope of patent application, wherein a gap in which the above-mentioned heat transfer tube is not disposed is left in the above-mentioned tube group. 4. The evaporator according to the scope of the patent application, wherein any group of the above-mentioned heat transfer tubes is staggered. 5. The evaporator according to item 丨 of the patent application, wherein the heat transfer tubes belonging to the tube group located above the container are arranged looser than the heat transfer tubes belonging to the tube group located below the container. 6. A freezer having an evaporator, which is configured by bundling a plurality of heat transfer tubes that circulate an object to be cooled in a container for introducing a refrigerant, and heats the refrigerant and the object to be cooled. Exchanging and cooling the object to be cooled while gasifying the refrigerant; a compressor that compresses the refrigerant that is vaporized in the evaporator; a condenser that condenses and liquefies the compressed refrigerant; and an expansion valve, In the process of circulating the liquefied refrigerant through the evaporator, the refrigerant is decompressed. -14-This paper size applies to China National Standard (CNS) A4 (210X297 mm)